Hong, Y.; James, S. W. (2009). New earthworms of the Pheretima urceolata species group (Oligochaeta: Megascolecidae) from southern Luzon, Philippines. Zootaxa. 2059: 33-45.
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Hong, Y.; James, S. W.
2009
New earthworms of the Pheretima urceolata species group (Oligochaeta: Megascolecidae) from southern Luzon, Philippines